Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f4566131e77d0b…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 01:42:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5ec794f8c0e06ffa9c3d56f66be5a9f SHA-1: 595d46c4a188dc04cf29fc33192af227c0d82daf SHA-256: 01f4566131e77d0b3802dbf480b8fde6e7a99e4dfe435dd7db9aad2e1d1b4237
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors, disguised as "free generator" or "game hack" lures. The primary redirector URL is http://netcdn.tw/app/431946152/free-emotes-roblox-game-hack. The document body and embedded URLs suggest a social engineering tactic to trick users into downloading potentially unwanted or malicious software. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/431946152/free-emotes-roblox-game-hack In PDF document text
    • http://www.perpus.stfm.ac.id/repository/hack-juegos-de-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-mod-apk-hack_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/roblox-free-download_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/login-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-time-hack-ios_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-links-that-don-t-expire_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-free-account_GM406889139.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/apps-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/tiktok-free-movies_GM835599320.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/coin-master-game-hack-app_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-do-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://www.perpus.stfm.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://perpus.stfm.ac.id/repository/is-there-a-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00003030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3030 22136 bytes
SHA-256: cb0adb01a8c433bf35e48e393273dc2688d466144492e0efaeb7ecc3463bebf5
font_01_sfnt_off00006147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6147 18828 bytes
SHA-256: 849fc9ac784bd8d7c3af196da1767cdff0907ecded31565c0d36ed57ec53fceb

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